Note that AS's bulkheads don't have a cutout at the bottom that you can place your feet through. For this reason, I avoid the 734 and 739 bulkheads like the plague, as I have slightly longer legs and like to stretch them out. Unlike alphaeagle above, I would take a regular seat over the bulkhead on these planes (and usually do, since the exit row window is miserable with the stump of an armrest on the aircraft wall).

That said, 6A or 6F is my favorite seat on the 73G and 738/73H, since the quarter-height curtain means you can easily stretch your legs out under the F seat in front of you.